Vega WEIGHTRAC 31 User manual

Operating Instructions
Radiometric sensor for mass ow
detection
WEIGHTRAC 31
Four-wire 4 … 20 mA/HART
Document ID: 42374

2
Contents
WEIGHTRAC 31 • Four-wire 4 … 20 mA/HART
42374-EN-211203
Contents
1 About this document ............................................................................................................... 4
1.1 Function ........................................................................................................................... 4
1.2 Target group ..................................................................................................................... 4
1.3 Symbols used................................................................................................................... 4
2 For your safety ......................................................................................................................... 5
2.1 Authorised personnel ....................................................................................................... 5
2.2 Appropriate use................................................................................................................ 5
2.3 Warning about incorrect use............................................................................................. 5
2.4 General safety instructions............................................................................................... 5
2.5 EU conformity................................................................................................................... 6
2.6 NAMUR recommendations .............................................................................................. 6
2.7 Installation and operation in the USA and Canada ........................................................... 6
2.8 Environmental instructions ............................................................................................... 6
3 Product description ................................................................................................................. 7
3.1 Conguration.................................................................................................................... 7
3.2 Principle of operation........................................................................................................ 9
3.3 Packaging, transport and storage..................................................................................... 9
3.4 Accessories.................................................................................................................... 10
3.5 Corresponding source container.................................................................................... 11
4 Mounting................................................................................................................................. 13
4.1 General instructions ....................................................................................................... 13
4.2 Mounting instructions ..................................................................................................... 14
5 Connecting to power supply................................................................................................. 24
5.1 Preparing the connection ............................................................................................... 24
5.2 Connection-Massowdetermination ........................................................................... 27
5.3 Connection - Summation................................................................................................ 29
5.4 Connection - Tachometer ............................................................................................... 31
6 Adjustment with the display and adjustment module........................................................ 34
6.1 Insert display and adjustment module............................................................................ 34
6.2 Adjustment system......................................................................................................... 35
6.3 Display and adjustment module - Indication of system parameters................................ 36
6.4 Saving the parameterisation data................................................................................... 40
7 Setup with PACTware............................................................................................................. 41
7.1 Connect the PC.............................................................................................................. 41
7.2 Parameter adjustment with PACTware............................................................................ 42
7.3 Parameteradjustment-Massowdetection.................................................................. 42
7.4 Saving the parameterisation data................................................................................... 58
7.5 Real value correction...................................................................................................... 58
8 Diagnostics and servicing .................................................................................................... 60
8.1 Maintenance .................................................................................................................. 60
8.2 Status messages............................................................................................................ 60
8.3 Rectify faults................................................................................................................... 63
8.4 Exchanging the electronics module................................................................................ 64
8.5 Software update ............................................................................................................. 65
8.6 How to proceed if a repair is necessary.......................................................................... 65

3
Contents
WEIGHTRAC 31 • Four-wire 4 … 20 mA/HART
42374-EN-211203
9 Dismount................................................................................................................................. 67
9.1 Dismounting steps.......................................................................................................... 67
9.2 Disposal ......................................................................................................................... 67
10 Supplement ............................................................................................................................ 68
10.1 Technical data ................................................................................................................ 68
10.2 Dimensions .................................................................................................................... 73
10.3 Industrial property rights................................................................................................. 78
10.4 Trademark ...................................................................................................................... 78
Safety instructions for Ex areas
TakenoteoftheExspecicsafetyinstructionsforExapplications.
These instructions are attached as documents to each instrument
with Ex approval and are part of the operating instructions.
Editing status: 2021-11-25

4
1 About this document
WEIGHTRAC 31 • Four-wire 4 … 20 mA/HART
42374-EN-211203
1 About this document
1.1 Function
This instruction provides all the information you need for mounting,
connection and setup as well as important instructions for mainte-
nance,faultrectication,theexchangeofpartsandthesafetyofthe
user. Please read this information before putting the instrument into
operation and keep this manual accessible in the immediate vicinity
of the device.
1.2 Target group
This operating instructions manual is directed to trained personnel.
Thecontentsofthismanualmustbemadeavailabletothequalied
personnel and implemented.
1.3 Symbols used
Document ID
This symbol on the front page of this instruction refers to the Docu-
ment ID. By entering the Document ID on www.vega.com you will
reach the document download.
Information, note, tip: This symbol indicates helpful additional infor-
mation and tips for successful work.
Note: This symbol indicates notes to prevent failures, malfunctions,
damage to devices or plants.
Caution: Non-observance of the information marked with this symbol
may result in personal injury.
Warning: Non-observance of the information marked with this symbol
may result in serious or fatal personal injury.
Danger: Non-observance of the information marked with this symbol
results in serious or fatal personal injury.
Ex applications
This symbol indicates special instructions for Ex applications.
• List
The dot set in front indicates a list with no implied sequence.
1 Sequence of actions
Numbers set in front indicate successive steps in a procedure.
Battery disposal
This symbol indicates special information about the disposal of bat-
teries and accumulators.

5
2 For your safety
WEIGHTRAC 31 • Four-wire 4 … 20 mA/HART
42374-EN-211203
2 For your safety
2.1 Authorised personnel
All operations described in this documentation must be carried out
onlybytrained,qualiedpersonnelauthorisedbytheplantoperator.
During work on and with the device, the required personal protective
equipment must always be worn.
2.2 Appropriate use
WEIGHTRAC31isasensorforcontinuousmassowdetectionon
conveyor belts as well as screw or chain conveyors.
Youcannddetailedinformationabouttheareaofapplicationin
chapter " Product description".
Operational reliability is ensured only if the instrument is properly
usedaccordingtothespecicationsintheoperatinginstructions
manual as well as possible supplementary instructions.
2.3 Warning about incorrect use
Inappropriate or incorrect use of this product can give rise to applica-
tion-specichazards,e.g.vesseloverllthroughincorrectmounting
or adjustment. Damage to property and persons or environmental
contamination can result. Also, the protective characteristics of the
instrument can be impaired.
2.4 General safety instructions
This is a state-of-the-art instrument complying with all prevailing
regulations and directives.The instrument must only be operated in a
technicallyawlessandreliablecondition.Theoperatorisresponsi-
ble for the trouble-free operation of the instrument. When measuring
aggressive or corrosive media that can cause a dangerous situation
if the instrument malfunctions, the operator has to implement suitable
measures to make sure the instrument is functioning properly.
The safety instructions in this operating instructions manual, the na-
tional installation standards as well as the valid safety regulations and
accident prevention rules must be observed by the user.
For safety and warranty reasons, any invasive work on the device
beyond that described in the operating instructions manual may be
carried out only by personnel authorised by the manufacturer. Arbi-
traryconversionsormodicationsareexplicitlyforbidden.Forsafety
reasons,onlytheaccessoryspeciedbythemanufacturermustbe
used.
To avoid any danger, the safety approval markings and safety tips on
the device must also be observed.
This measuring system uses gamma rays. Therefore take note of the
instructions for radiation protection in chapter " Product description".
Any work on the source container may only be carried out under the
supervisionofaqualiedradiationprotectionocer.

6
2 For your safety
WEIGHTRAC 31 • Four-wire 4 … 20 mA/HART
42374-EN-211203
2.5 EU conformity
ThedevicefullsthelegalrequirementsoftheapplicableEUdirec-
tives.ByaxingtheCEmarking,weconrmtheconformityofthe
instrument with these directives.
The EU conformity declaration can be found on our homepage.
Electromagnetic compatibility
Instruments in four-wire or Ex-d-ia version are designed for use in an
industrial environment. Nevertheless, electromagnetic interference
from electrical conductors and radiated emissions must be taken into
account, as is usual with class A instruments according to EN 61326-
1.Iftheinstrumentisusedinadierentenvironment,theelectromag-
netic compatibility to other instruments must be ensured by suitable
measures.
2.6 NAMUR recommendations
NAMUR is the automation technology user association in the process
industry in Germany. The published NAMUR recommendations are
acceptedasthestandardineldinstrumentation.
ThedevicefullstherequirementsofthefollowingNAMURrecom-
mendations:
• NE 21 – Electromagnetic compatibility of equipment
• NE 43 – Signal level for fault information from measuring transduc-
ers
• NE53–Compatibilityofelddevicesanddisplay/adjustment
components
• NE107–Self-monitoringanddiagnosisofelddevices
For further information see www.namur.de.
2.7 Installation and operation in the USA and
Canada
This information is only valid for USA and Canada. Hence the follow-
ing text is only available in the English language.
Installations in the US shall comply with the relevant requirements of
the National Electrical Code (ANSI/NFPA 70).
Installations in Canada shall comply with the relevant requirements of
the Canadian Electrical Code.
2.8 Environmental instructions
Protection of the environment is one of our most important duties.
That is why we have introduced an environment management system
with the goal of continuously improving company environmental pro-
tection.Theenvironmentmanagementsystemiscertiedaccording
to DIN EN ISO 14001.
Pleasehelpusfullthisobligationbyobservingtheenvironmental
instructions in this manual:
• Chapter " Packaging, transport and storage"
• Chapter " Disposal"

7
3 Product description
WEIGHTRAC 31 • Four-wire 4 … 20 mA/HART
42374-EN-211203
3 Product description
3.1 Conguration
Thetypelabelcontainsthemostimportantdataforidenticationand
use of the instrument:
9
10
4
5
3
6
7
8
9
2
1
Fig. 1: Layout of the type label (example)
1 Instrument type
2 Product code
3 Electronics
4 Protection rating
5 Ambient temperature
6 Measurement width
7 Hardware and software version
8 Order number
9 Serial number of the instrument
10 ID numbers, instrument documentation
The type label contains the serial number of the instrument. With it
youcanndthefollowinginstrumentdataonourhomepage:
• Product code (HTML)
• Delivery date (HTML)
• Order-specicinstrumentfeatures(HTML)
• Operating instructions and quick setup guide at the time of ship-
ment (PDF)
• Testcerticate(PDF)-optional
Move to " www.vega.com"andenterinthesearcheldtheserial
number of your instrument.
Alternatively, you can access the data via your smartphone:
• Download the VEGA Tools app from the " Apple App Store" or the
" Google Play Store"
• Scan the QR-code on the type label of the device or
• Enter the serial number manually in the app
This operating instructions manual applies to the following instrument
versions:
• Hardware from 1.0.6
Type label
Serial number - Instru-
ment search
Scope of this operating
instructions

8
3 Product description
WEIGHTRAC 31 • Four-wire 4 … 20 mA/HART
42374-EN-211203
• Software from 2.1.0 1)
• Hardware from 2.0.0
• Software from 3.0.0
Theinstrumentisavailableindierentelectronicsversions.Eachver-
sioncanbeidentiedviatheproductcodeonthetypelabel:
• Standard electronics type PROTRACH.-XX
The scope of delivery encompasses:
• Radiometric sensor
• Measuring frame (optional)
• Mounting accessories
• Documentation
• Bluetooth module (optional)
– This operating instructions manual
– Ex-specic"Safety instructions" (with Ex versions)
– Ifnecessary,furthercerticates
1
3
5
5
4
3
2
Fig. 2: WEIGHTRAC 31
1 Source container (e.g. SHLD-1)
2 WEIGHTRAC 31
3 Support stand
4 Crossbeam
5 Clamp collars
Note:
The appropriate source container (e.g. SHLD-1) must be ordered
separately.
Electronics versions
Scope of delivery
1) It is not possible to update the software to 3.0.0. In this case the electronics
module must be exchanged.

9
3 Product description
WEIGHTRAC 31 • Four-wire 4 … 20 mA/HART
42374-EN-211203
3.2 Principle of operation
The instrument is suitable for bulk solid applications on conveyor belts
and screw conveyors.There are application possibilities in nearly all
areas of industry.
In radiometric measurement, a Caesium-137 or Cobalt-60 isotope
emits focussed gamma rays that are attenuated when penetrating
the conveyor belt and the medium. The PVT detector on the lower
side of the conveyor belt receives the radiation, whose strength is
proportional to the density.The measuring principle has proven to be
very reliable in conjunction with extreme process conditions because
it measures contactlessly from outside through the conveyor belt.The
measuring system ensures maximum safety, reliability and plant avail-
ability, independently of the medium and its properties.
3.3 Packaging, transport and storage
Your instrument was protected by packaging during transport. Its
capacity to handle normal loads during transport is assured by a test
based on ISO 4180.
The packaging consists of environment-friendly, recyclable card-
board. For special versions, PE foam or PE foil is also used. Dispose
of the packaging material via specialised recycling companies.
Transport must be carried out in due consideration of the notes on the
transport packaging. Nonobservance of these instructions can cause
damage to the device.
The delivery must be checked for completeness and possible transit
damage immediately at receipt. Ascertained transit damage or con-
cealed defects must be appropriately dealt with.
Up to the time of installation, the packages must be left closed and
stored according to the orientation and storage markings on the
outside.
Unless otherwise indicated, the packages must be stored only under
the following conditions:
• Not in the open
• Dry and dust free
• Not exposed to corrosive media
• Protected against solar radiation
• Avoiding mechanical shock and vibration
• Storage and transport temperature see chapter " Supplement -
Technical data - Ambient conditions"
• Relative humidity 20 … 85 %
With instrument weights of more than 18 kg (39.68 lbs) suitable and
approved equipment must be used for lifting and carrying.
Application area
Functional principle
Packaging
Transport
Transport inspection
Storage
Storage and transport
temperature
Lifting and carrying

10
3 Product description
WEIGHTRAC 31 • Four-wire 4 … 20 mA/HART
42374-EN-211203
3.4 Accessories
The display and adjustment module is used for measured value indi-
cation, adjustment and diagnosis.
The integrated Bluetooth module (optional) enables wireless adjust-
ment via standard adjustment devices.
The interface adapter VEGACONNECT enables the connection of
communication-capable instruments to the USB interface of a PC.
The VEGADIS 81 is an external display and adjustment unit for VEGA
plics®sensors.
VEGADIS 82 is suitable for measured value indication and adjustment
of sensors with HART protocol. It is looped into the 4 … 20 mA/HART
signal cable.
The electronics module PT30… is a replacement part for radiometric
sensors WEIGHTRAC 31.
It is located in the large electronics and connection compartment.
The electronics module can only be exchanged by VEGA service
technician.
The supplementary electronics module PROTRAC.ZE… is a replace-
ment part for radiometric sensors WEIGHTRAC 31.
It is located in the lateral adjustment and connection compartment.
If you have ordered WEIGHTRAC 31 without a measuring frame, a
basic mounting set is enclosed with the instrument. It includes every-
thing needed to fasten the measuring tube reliably.
The corresponding measuring frame and mounting accessories can
be ordered optionally.
Use a tachometer for detection of the belt speed.The tachometer can
be connected to the input of the WEIGHTRAC 31.
The reference absorber is a test facility for the WEIGHTRAC 31. It
is suitable for reference measurement on conveyor belts and screw
conveyors. A certain measured value can be exactly reproduced for
test purposes when a conveying system is empty.
In order to exclude external interference radiation, you can mount a
gamma modulator in front of the source holder. This allows reliable
measurement even when interference radiation occurs.
PLICSCOM
VEGACONNECT
VEGADIS 81
VEGADIS 82
Electronics module -
PT30
Supplementary electron-
ics module - PROTRAC.
ZE
Basic mounting set
Measuring frame for
mounting
Tachometer
Reference absorber
Gamma modulator

11
3 Product description
WEIGHTRAC 31 • Four-wire 4 … 20 mA/HART
42374-EN-211203
Fig. 3: Gamma modulator (optional) for uninterrupted measurement even with
interference radiation
1 Gamma modulator (mounted on the source holder)
For ambient temperatures up to 120 °C (248 °C) the gamma modula-
tor is optionally available with water cooling.
Anynumberofdevicescanbesynchronized.Tosynchronizeseveral
gamma modulators, you need a controller.
3.5 Corresponding source container
An isotope in a suitable source container (e.g. SHLD-1) is the prereq-
uisite for a radiometric measurement setup.
The handling of radioactive substances is regulated by law. The radia-
tion protection rules of the country in which the system is operated
applyrstandforemost.
In Germany, for example, the current radiation protection ordinance
(StrlSchV) based on the Atomic Energy Law (AtG) applies.
The following points are important for measurement with radiometric
methods:
A handling permit is required for operation of a system using gamma
rays.Thispermitisissuedbytherespectivegovernmentoceorthe
responsibleauthority(inGermany,forexample,ocesforenviron-
mental protection, trade supervisory boards, etc.)
Youcanndfurtherinstructionsintheoperatinginstructionsmanual
of the source container.
Handling permit

12
3 Product description
WEIGHTRAC 31 • Four-wire 4 … 20 mA/HART
42374-EN-211203
When handling radioactive substances, unnecessary radiation
exposure must be avoided. An unavoidable radiation exposure must
be kept as low as possible. Take note of the following three important
measures:
1 2 3
Fig. 4: Measures for protection against radioactive radiation
1 Shielding
2 Time
3 Distance
Shielding: Provide good shielding between the source and yourself
as well as all other persons. Special source containers (e.g. SHLD-1)
as well as all materials with high density (e.g. lead, iron, concrete,
etc.)provideeectiveshielding.
Time: Stay as short a time as possible in radiation exposed areas.
Distance:Your distance to the source should be as large as possible.
The local dose rate of the radiation decreases in proportion to the
square of the distance to the radiation source.
Theplantoperatormustappointaradiationsafetyocerwiththe
necessary expert knowledge. He is responsible for ensuring that the
radiation protection ordinance is complied with and for implementing
all radiation protection measures.
Control areas are areas in which the local dose rate exceeds a certain
value.Onlypersonswhoundergoocialdosemonitoringareallowed
intothesecontrolareas.Youcanndtherespectivelyvalidlimitvalues
for control areas in the guideline of the respective authority (in Ger-
many, for example, the radiation protection ordinance).
We are at your disposal for further information concerning radiation
protection and regulations in other countries.
General instructions for
radiation protection
Radiationsafetyocer
Control area

13
4 Mounting
WEIGHTRAC 31 • Four-wire 4 … 20 mA/HART
42374-EN-211203
4 Mounting
4.1 General instructions
The source container is part of the measuring system. In case the
source container is already equipped with an active isotope, the
source container must be locked before mounting.
Danger:
Before mounting; make sure that the source is securely closed. Use
a padlock to secure the source container in the closed condition and
prevent it from being inadvertently opened.
Protect your instrument against moisture ingress through the following
measures:
• Use a suitable connection cable (see chapter " Connecting to
power supply")
• Tighten the cable gland or plug connector
• Lead the connection cable downward in front of the cable entry or
plug connector
This applies mainly to outdoor installations, in areas where high
humidity is expected (e.g. through cleaning processes) and on cooled
or heated vessels.
Note:
Make sure that during installation or maintenance no moisture or dirt
can get inside the instrument.
To maintain the housing protection, make sure that the housing lid is
closed during operation and locked, if necessary.
Note:
For safety reasons, the instrument must only be operated within the
permissibleprocessconditions.Youcannddetailedinformationon
the process conditions in chapter " Technical data" of the operating
instructions or on the type label.
Hence make sure before mounting that all parts of the instrument ex-
posed to the process are suitable for the existing process conditions.
These are mainly:
• Active measuring component
• Processtting
• Process seal
Process conditions in particular are:
• Process pressure
• Process temperature
• Chemical properties of the medium
• Abrasionandmechanicalinuences
Switchosource
Protection against mois-
ture
Process conditions

14
4 Mounting
WEIGHTRAC 31 • Four-wire 4 … 20 mA/HART
42374-EN-211203
Metric threads
In the case of instrument housings with metric thread, the cable
glands are screwed in at the factory.They are sealed with plastic
plugs as transport protection.
You have to remove these plugs before electrical connection.
NPT thread
In the case of instrument housings with self-sealing NPT threads, it is
not possible to have the cable entries screwed in at the factory. The
free openings for the cable glands are therefore covered with red dust
protection caps as transport protection.
Prior to setup you have to replace these protective caps with ap-
proved cable glands or close the openings with suitable blind plugs.
The suitable cable glands and blind plugs come with the instrument.
4.2 Mounting instructions
Note:
During the planning, our specialists will analyse the conditions of the
measurement loop to dimension the isotope accordingly.
Yougeta"SourceSizing"documentspecifyingtherequiredsource
activity and containing all relevant mounting information for your
measuring point.
Youmustfollowtheinstructionsinthis"SourceSizing"documentin
addition to the following mounting instructions.
The following mounting information is applicable as long as there is
nothingelsespeciedinthe"SourceSizing"document.
You can position and mount WEIGHTRAC 31 in the measuring frame
from both sides.
Direct the exit angle of the source container to the WEIGHTRAC 31.
Mountthesourcecontaineratthespecieddistancetotheconveyor
belt. Secure the area with a safety fence and protective grating so that
no one can reach into the dangerous area.
Youcanndinformationonprotectivebarriersandthemounting
of the corresponding source container in the operating instructions
manual of the source container.
If you have ordered WEIGHTRAC 31 without measuring frame, a
basic mounting set is enclosed with the instrument.
Determine the mounting position of the sensor in advance.
1. Fasten the mounting bracket (6) to your conveyor belt.
You can either weld the mounting bracket (6) to your system or
fasten it with screws through the two ø9 mm (0.35 in) holes.
2. Place two clamp collars (4) onto the premounted mounting brack-
ets (6).
Cable glands
Installation position
Basic mounting set

15
4 Mounting
WEIGHTRAC 31 • Four-wire 4 … 20 mA/HART
42374-EN-211203
1
2
3
4
5
4
2
6
7
Fig. 5: Mounting of the sensor with the basic mounting set
1 Screws M6 x 120 (4 pieces)
2 Wedge lock washer M6 Nordlock (8 pieces)
3 Cover plate (2 pieces)
4 Clamp collar (4 pieces) PA
5 Sensor
6 Mounting bracket
7 Nut M6 (4 pieces)
Note:
Mount the instrument housing of the sensor on an easily accessible
side of the conveyor belt so that the instrument is easily accessible for
operation and service.
3. Move the sensor (5) laterally beneath the conveyor belt and place
the sensor in the two clamp collars (4).
Position the measuring width of the sensor below the conveyor
belt as close as possible to the center. Make sure that there is
sucientdistancebetweensensorandconveyorbeltwhenthe
belt is loaded.
4. Place the other two clamp collars (4) according to the illustration
above the clamp collars that are already in place (4).
5. Place a metallic cover plate (3) according to the illustration on
each upper clamp collar (4).

16
4 Mounting
WEIGHTRAC 31 • Four-wire 4 … 20 mA/HART
42374-EN-211203
6. Insert the screws (1), each with one wedge lock washer (2),
through the clamp collars (4).
7. Place a wedge lock washer (2) from below on each screw (1) and
screw one nut (7) onto each screw.
8. Align the clamp collars (4) and tighten the nuts (7) evenly with
8 Nm (5.9 lb ft).
9. Check if the sensor (5) is fastened correctly.
- Conveyor belts
Mount the measuring frame in such a way that the measurement tube
of WEIGHTRAC 31 is below the conveyor belt (tight span).
Keep a distance of at least 10 mm (0.4 in) between the conveyor belt
and the measurement tube of WEIGHTRAC 31.
- Screw conveyors
Mount the measuring frame at a position on the spiral conveyor where
the product is transported steadily. Avoid places where the product
accumulates or falls back over the worm shaft.
- Chain conveyors
When mounting the WEIGHTRAC 31 on a chain conveyor, the instal-
lation angle is very important for optimal irradiation.
Followtheinstructionsinthe"SourceSizing"document.
Mounting of the measuring frame (optional)
The measuring frame with mounting accessories can be selected as
an option. If you have ordered WEIGHTRAC 31 with measuring frame,
then proceed as follows.
Mounting - Crossbeam
Before fastening the support stands, we recommend premounting the
measuring frame. By doing this you can easily lay out the holes for
fastening the unit to the conveyor belt.
To mount the measuring frame you need a torque wrench (45 Nm or
8Nm)andtwosocketwrenchesofsize16and10.
1. Placethecrossbeam(4)ontheupperholdingxturesofthetwo
support stands (6).
Make sure that the crossbeam (4) has an excess length of ap-
prox. 30 mm on both sides.
Measuring frame (op-
tional)

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4 Mounting
WEIGHTRAC 31 • Four-wire 4 … 20 mA/HART
42374-EN-211203
1
2
3
4
2
5
6
Fig. 6: Mounting the crossbeam
1 Screws M10 x 40 (12 pcs.)
2 Wedge lock washer M10 Nordlock (24 pieces)
3 Crossbeam (1 piece)
4 Toe clamps (4 pieces)
5 Nut M10 (12 pieces)
6 Support stand (2 pieces)
2. Place the four clamping claws (4) with the corrugation downwards
into the crossbeam (3).
3. Insert the screws (1) with one wedge lock washer (2) through the
clamping claws (4).
4. Place a wedge lock washer (2) from below on each screw (1) and
screw one nut (5) onto each screw.
5. Alignthecrossbeam(3)withtheupperholdingxturesofthe
support stands (6) and tighten the nuts (5) evenly with 45 Nm
(33.2 lb ft).
Mounting - Support stand
1. Place the premounted measuring frame above the conveyor belt
and determine a suitable position for mounting the support stands
(6).
Mount the measuring frame as well centered as possible and
at an angle of 90° above the conveyor belt. Keep enough lateral
distance to the conveyor belt.

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4 Mounting
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42374-EN-211203
2. Drill the through-holes for the support stands (6) according to the
following drilling plan.
The through-holes in the support stands (6 in each) are suitable
forscrewsofsizeM10.
The screws (14) and the washers (15) for fastening on the con-
veyor belt are not included in the scope of delivery.
120 mm
(4.72") 15 mm
(0.59")
150 mm
(5.91")
15 mm
(0.59")
270 mm
(10.63")
300 mm
(11.81")
ø 12 mm
(0.47")
Fig. 7: Drilling plan for support stands
3. Use suitable washers (15) for mounting the support stands (6).
14
15
Fig. 8: Mounting the support stands
14 Screw M10 (24 pieces) - provided by the customer
15 Washer M10 (24 pieces) - provided by the customer
4. Tighten the screws (14) evenly with 45 Nm (33.2 lb ft).

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4 Mounting
WEIGHTRAC 31 • Four-wire 4 … 20 mA/HART
42374-EN-211203
Mounting - Sensor
1. Place two of the clamp collars (11) on the fastening brackets of
the support stands (6).
8
9
10
11
13
11
9
12
Fig. 9: Mounting the sensor in the measuring frame
8 Screws M6 x 120 (4 pieces)
9 Wedge lock washer M6 Nordlock (8 pieces)
10 Cover plate (2 pieces)
11 Clamp collar (4 pieces)
12 Nut M6 (4 pieces)
13 Sensor
Note:
Mount the instrument housing of the sensor on an easily accessible
side of the conveyor belt so that the instrument is easily accessible for
operation and service.
2. Insert the sensor (13) laterally into the measuring frame beneath
the conveyor belt and place the sensor in the two clamp collars
(11).
Position the measuring width of the sensor below the conveyor
belt as close as possible to the center. Make sure that there is

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4 Mounting
WEIGHTRAC 31 • Four-wire 4 … 20 mA/HART
42374-EN-211203
sucientdistancebetweensensorandconveyorbeltwhenthe
belt is loaded.
3. Place the other two clamp collars (11) according to the illustration
above the clamp collars that are already in place (11).
4. Place a metallic cover plate (10) according to the illustration on
each upper clamp collar (11).
5. Insert the screws (8), each with one wedge lock washer (9),
through the clamp collars (11).
6. Place a wedge lock washer (9) from below on each screw (8) and
screw one nut (12) on each of the screws.
7. Align the clamp collars (11) and tighten the nuts (12) evenly with
8 Nm (5.9 lb ft).
8. Check if the sensor (13) is fastened correctly.
Mounting - Source container
1
7
5
2
Fig. 10: Mounting the source container on the measuring frame
1 Screw M10 x 65 (4 pieces)
2 Wedge lock washer M10 Nordlock (8 pieces)
5 Nut M10 (4 pieces)
7 Source holder (SHLD-1)
1. Place the closed and locked source container (7) from above onto
the measuring frame.
The source container is very heavy. Therefore use a suitable lifting
device. For this purpose the source container is equipped with a
suitable eye-bolt for a lifting hook, etc.
Note:
Select the alignment of the source holder so that the rotary mecha-
nism of the source holder is located on the easily accessible side of
the conveyor belt. This makes the rotary mechanism easily accessible